Statistical machine



Nov. 28, 1939. w. s. AUSTIN STATISTICAL IAc'amE Filed lay a1, 1935 5 Sheets-Sheet I v INVENTOR WILLIAM .B. flusnw flu, M M

. ATTORNEYS Nov. 28, 1939. w; a. AUSTIN 218L166 STATISTICAL 'IACHINE Filed May 31, 1935 5 Sheets-Sheet 2 ATTORNEYS Nov. 28, 1939. w, B Auwswm 2,181,166

STATISTICAL CHINE Filed lay 31, 1935 5 Shets-Sheet 3 INVENTOR WIL Man .8. .4 1152711! Ma -w ATTORNEYS Nov. 28, 1939. I w, B, AUSTIN. 2,181,166

' STATISTICAL MACHINE Filed May 31, 1935 5 Sheets-Sheet 4 am 9m INVENTOR WILLIAM B. Ausrm I Vac/M Juli-I ATTORNEYS Nov. 28, 1939.

w. B. AUSTIN STATISTICAL MACHINE Filed May 51, 1935 5 Sheets-$11981: 5

btutokba $38 QOH OOM m m ooq QQN DON m QR 00k INVENTOR Wang 3. 19175771? Y/MMJ ATTORNEYS Patented Nov. 28, 1939 UNITED STATES PATENT OFFICE 13 Claims.

This invention relates to improvements in statistical machines and has for a principal object the provision of an adding machine hav-- ing electrically actuated devices associated therewith to count all like entries that are entered into the adding machine. I

Another object of the invention is the provision of an adding machine and a plurality of counting registers associated therewith adapted to count the number of times each of a plurality of figures has been entered into the adding machine, each register counting one figure which may consist of one or more digits.

A further object of the invention is the provision of an adding machine having electrical contacts associated with the keys and adapted to complete electrical circuits for eflecting controls outside of the adding'machine per se without afiecting the operation of the adding machine.

Another object of the'invention is the provision of a plurality of keys each adapted to mechanically actuate an adding mechanism and each also adapted to control electrical circuits.

A further object of the invention is the provision of an accumulating and printing mechanism, keys for efiecting set ups therein, said keys also being adapted to complete circuits through relays connected thereto for controlling electrical circuits associated with said keys.

Still another object of the invention is the provision of a machine including accumulating and printing mechanisms, keys for efiecting'set ups in said mechanisms and a plurality of other electrically actuated accumulating and printing devices each having at least one electro-magnetic winding associated therewith, said windings each having a wire associated with or controlled by some of said keys and another wire associated with or controlled by others of said keys, said last accumulators being adapted to have items entered therein in accordance with which of said keys are actuated but not in accordance with the values entered in said first accumulators.

Still a further object of the invention is the provision of a machine including accumulating and printing mechanisms, keys for effecting set ups in said mechanisms and a plurality of other accumulating and printing devices electrically actuated by the closing of contacts by the movement of said keys, one of said devices being provided for each possible combination of keys and arranged to enter a value of one each time its combination of keys is set up.

Another object of the invention is the provision of mechanisms for listing and totalizing the amounts from bills or the like and obtaining as a byproduct of this operation counts totalizing the number of bills handled of each amount and the total number of bills handled. 5.

Still another object of the invention is the provision of an accumulator for entering the codes corresponding to data, other accumulators into which statistical datais entered as a by-product of the first operation and still other accumuw lators for totalizing the number of steps in the operation.

Other objects and advantages of the invention will be obvious to those skilled in the art.

In certain types of statistical work it is desired 15 to obtain a count of the number of times any given figure may appear in a large number of items. As an example of this, a case might be taken where a light and power company wish to make a rate study to determine how many consumers have used, for example, 10 kilowatt hours in a month, how many 11 kilowatt hours, how many 12 kilowatt hours, etc., possibly from 0 kilowatt hours up to 1,000 kilowatt hours. By existing methods and devices such a rate study requires a great many steps and is an expensive procedure.

By means of the device, which is the subject of the present application, rate studies may be obtained as a by-product of other work which 90 has to be done. For example, the bills must be added up to determine what total the bills for a month amount to anda rate study may be obtained as a by-product of this operation without involving any more time than is required to enter the items into the adding machine and totalize them. I

Another example of the use of the present invention is in questionnaire work. The answers to questions may be numbered with a code 49 number and thereby the device can be caused to count how many people give answer No. 20, answer No. 506, answer No. 999, etc.

In using the device herein shown and described,

a plurality of counting registers is associated with this adding machine, one register for each number, figure or amount from 0 to 999. It is obvious that the number of registers may be increased or decreased in accordance with the 50 usage to which the machine is to be put. The counting registers are not .disturbed during the entire operation of totalizing the bills; for example; and after the operation has been comp ated the total counts of all of the counters is printed on a collective sheet, preferably in one operation.

Of course, it is obvious that as many printings as desired may be taken from these counting registers from time to time as the work progresses but it is usual to take the final totals entered into these registers at the end of an operation.

Referring to the drawings:

Figure 1 is a perspective view of the new and improved device incorporated in a casing having the form of a desk;

Figure 2 is a fragmentary view of a portion of the adding machine keyboard showing the re lation of the adding machine key to its normal cooperating member in the adding machine and to contacts, associated with each key, which are closed by the actuation oi a key without interfering with the normal controls in the adding machine controlled by the key;

Figure 3 is an enlarged detailed view showing a portion of an adding machine key and electrical contacts associated therewith;

Figure 4 isa view of a multiple contact relay of the character used in the device;

Figure 5 is a face elevation of one of the counting registers with its associated actuating magnet;

Figure 6 is an end view of the register shown in Figure 5 showing details of the mechanism and the relation of the magnet thereto;

Figure 7 is a fragmentary view showing one method of obtaining printings from the counting registers; and

Figures 8a, 8b, 8c, and 8d, together, constitute a diagram showing the electrical circuits of the device; Figure 8a showing a row of one hundreds keys of the adding machine, the contacts controlled thereby and the typical contact relays associated therewith; Figure 8a also showing the tens keys, the contacts associated therewith and the multiple contact relays controlled by these keys; Figure 8b taken with Figure 80, showing the units keys of the adding machine, the contacts actuated thereby and the ten multiple contact relays associated with each key actuated contact; and Figure 8d showing the connections to the magnets controlling the counting registers.

The device, Figure 1, is housed in a casing l0 preferably made in the form of a desk. The upper surface II has a depression 12 formed therein to accommodate the adding machine 13. The desk also has a slot 14 formed at the juncture of the rear edge of the upper surface or top II and a hinged back IS.

A sheet of paper l6 may be inserted in the slot I 4 so that totals may be printed from counting registers housed between the intermediate plate l1 and the hinged back 15. The construction and the arrangement of the counting registers and the method of taking printings therefrom will presently be described.

The adding machine 13 may be of any desired type. In the preferred embodiment of the invention an adding machine of the Burroughs type, such as is shown and described in Patent No. 1,914,401, dated June 20, 1933, to T. M. Butler, Figure 1.

Figures 2 and 3 of the present application are fragmentary views of the depressible amount keys, designated by the numeral 18, and their associated differential stop bars, one of which is designated by the numeral I9. These differential stop bars are released by the mechanism after an amount key 18 is depressed and notches, one

of which is designated by the numeral 20, are engaged and stopped in certain positions by the keys 63 (in accordance with which key is depressed) and thereby control the amounts entered into the accumulator of the adding machine and control the positions of theprinting bars.

The adding machine l3 has the new and additional feature of a pair of contacts associated with and adapted to be, closed by each key. In order to keep the drawings from becoming, too complicated by duplication of pairs only one pair of such contacts is shown, one contact being designated by the numeral 21 and the other by the numeral 22.

The contact 21 is carried by a contact arm 23 and the contact 22 is carried by the contact arm 23. The contact arms are separated by insulation 25 and are suitably supported on the plate 21 by means of a block of insulation 26. Each key 18 is provided with a pin 28 projecting therefrom and a block of insulation 29, carried on the arm 24 on the opposite side to that of the contact point 2", is engaged by the pin 28 when an amount key 18 is depressed. As each depressed key of the adding machine is retained in the depressed position after being struck, the contacts 20, 22 are held into engagement from the time a key is depressed until the machine accumulates and prints.

Cables forming terminals of the contact arms are lead from the adding machine to a plurality of relays. These relays are of the general form shown in Figure 4 and designated generally by the numeral 30. They consist of a yoke or frame 31 having an electroemagnet 32 secured thereto.

An armature 33 is pivotally mounted on the frame 31 and is adapted to be attracted by the core 34 of the magnet when the latter is energized. The arm 33 carries a contact member 35 on one side thereof and a contact point 33 on an opposite side thereof. A bracket 38 is secured. to the frame 31 and carries at its upper end a block of insulation 33 which in turn supports a contact point 31 in cooperative relation to the contact point 36. A suitable lug 40 is provided for connecting the contact point 31 in circuit with some of the contact arms 23, 24, which connections will presently be described.

A supporting member 4| is secured to the frame 3| and has secured thereto an insulating block 42 forming a support for a plurality of contact points, one of which is designated by the numeral 43. Each contact point 43 is provided with a suitable connector lug 44.

In some of the relays employed in the device ten contact points 43 are used and the contact member 35 is of sufficient width to make contact with all ten of the contact points when the magnet 32 is energized.

Others of the relays employed have a single contact point 43 which is engaged by the con tact member 35 when the armature 33 is attracted by the magnet 32. Normally the contact point 36 and the contact point 31 are in contact with each other.

One of the relays (the one associated with the 1 key in the tens row) is provided with ten contact points 43 and ten contact points 31 so that when its armature 33 is in its normal position all ten of the contacts 31 are connected together and to the armature 33. When its magnet 32 is energized contact with the ten contact points 31 is broken and contact is established between the contact member 35 and the ten contact points 43. The details of these connections will be described in connection with the description of the diagram, Figures 8a,'8b, 8c and 8d.

A suitable spring 45 engages the armature 33 and engages a lug 46 carried by the frame 3| and is so arranged that normally the contacts 35 and 3? are engaged.

The device is provided with a plurality of counters controlled by the key contacts 2|, 22 and the various relays 30. In the embodiment herein shown and described, 1,000 counters, such as shown in Figures and 6, are used.

The counter, generally designated by the numeral 41, is comprised of a shaft 48 suitably journalled on a supporting plate or member 49. The shaft 48 carries a plurality of counter wheels. Each counter wheel is provided with an internal pawl 5|, which is engaged by a keyway 52 when the counters are reset, as will presently be described. Each counter wheel has secured thereto a ten-toothed ratchet 53.

The ratchet has curved recesses 54 between each of 9 of the teeth and a deeper recess 55 between the lst andthe th tooth for the purpose of carry-over, which will presently be described.

The curved recesses are successively engaged by a member 56 to prevent the counter wheel from over-running". A metallic block 51 is secured to the plate 49 and forms a support for a plurality of the members 56, a pivot pin 58 serving to pivotally support all the members 56.

Each member 56 is provided with an ear 59, and a spring 60, imbedded in the block 51, retains each member 56 in engagement with its associated ratchet.

The block 51 has a cutaway portion 6| forming a recess therein. A yoke 62 is pivotally mounted in this depression by means of a pivot pin 63. The yoke 62 has pivoted thereto a pawl member 64 carrying at its upper end a plurality of pawls 55, 66, El, 68, 69 of difierent lengths. A spring 70 is provided to keep one or more of the pawl members in engagement with one or more of the ratchets 53.

An electro-magnet 1|, suitably supported on the plate 49, is provided with a pivoted armature '52. A lever 73 is secured to and extends outwardly from the armature 12. The yoke 62 has a boss 14 extending therefrom, and a connecting rod connects the lever 13 to the boss 14. The connecting rod 15 is pivotally connected to the lever 73 by means of a pivot pin 16 and is connected to the boss 14 by a pivot pin 11.

Cut

When the magnet II is energized, its core 78 attracts the armature 12 and causes it to move to the left, as viewed in Figure 6, thereby swinging the lever 13 upwardly. This motion is imparted to the yoke 62 by means of the push rod '15 and is in turn imparted to a counter wheel by one of the pawls carried on the pawl member 84. The leveragesare so designed that the counter wheel is moved one-tenth of a revolution and such action will accordingly enter a value of 1 into the counter.

When the pawl 65, which engages the ratchet associated with the unit counter wheel, moves the ratchet to a point where the depression 55 is encountered, the spring 10 causes the pawl 65 to enter the depression 55, at which time the pawl 86 will engage the ratchet associated with the tens counter Wheel. This occurs after the units wheel indicates a value of 9.

Withthe pawl in the position'just described movement of the counter, due to the energization of the magnet, will cause the pawl 55 to move the shaft may be rotated in the direction in which the counter wheels normally rotate. As this shaft is rotated its keyway is engaged by the internal pawl 5| in the counter wheels and thereby the latter is positively rotated. The movement of the shaft 48 is so gaged that it will bring all of the counters with the 0s" uppermost.

In making a rate study, the items, are entered into the adding machine l3 and the new and improved device automatically counts the number of bills of each value entered in the adding machine as a by-product of and without affecting the adding machine per se.

Before resetting the counters, as described above, the values shown in all of the counters are printed on a collective sheet IS. The sheet l6 is inserted into the slot l4 and a lever (not shown) is thrown. This lever moves a movable frame member 80 which carries a plurality of printing rollers 8| which may be made of rubber or any other suitable platen material. A stationary frame member 82 is provided with a plurality of studs or pins 83. 80 is provided with a plurality of slots 84 each of which is engaged by a pin 83.

A suitable ribbon or carbon paper 85 is positioned between the sheet of paper i6 and the pr;nting rollers 8|.

As the movable frame member 80 is moved downwardly, as viewed in Figure 7, the slanting portions of the slots 84 causes the frame member 80 to move to the left as Well as downwardly until the portion 86 of the slot is reached.

At this time the printing rollers 8| are in position to print and further downward movement of the member 80 is guided in a straight line by the straight portions of the slots 84 and thereby the printing rollers,8| cause impressions from the counter wheels 58 to be printed on the paper l6.

At the end of the printing stroke the movable frame member 80 is moved up to its normal position with the rollers 8| out of engagement with the ribbon 85 and the paper I6 so that the latter may be readily removed from the device.

After the printing operation the counters may be reset by means of the bell crank 79.

The relays are supported within the casing l8 and the counters are assembled in avertical plane within the casing substantially in line with the slot M in order that the printing, above described, may be effected with facility.

It is obvious that these elements may be grouped in many other arrangements without departing from the spirit of the invention.

The diagram of connections of the key contacts, the relays, and the counters will now be described.

The circuits are so arranged that active circuits are set up by the relays upon the actuation of the various keys of the adding machine and the circuits thus completed are subsequently energized by the actuation of a total key or the motor bar on the adding machine. Heretofore it has been customary to connect the, so called, re-

The movable member turn wires of various relay and magnet coils in common or to a ground connection, but in the present invention these return wires" are selectively included in the circuits due to the actuation of other relays, and the wires; leading wires to these magnet coils may also be selectively included in circuits so that due to the selective inclusion of both ends oi? each winding in the circuits great degree of flexibility is obtained.

In the present specification the outer end of each magnet winding, whether it be included in the relay or in a counter, will be designated as the terminal a. 0! the winding. The inner end 0! the winding will be designated as the terminal 12 of the winding.

Although the relay is illustrated, in Figure 4, and'its various forms described, to avoid confusion the armatures, contact points, and magnet windings in the diagram will be given different numerals so that they can be readily distinguished from each other.

Referring to Figure 8a;

The hundreds keys, together with their associated contact members and relays will first be described, followed by a description of the tens keys and their associated instrumentalities, and then the units keys and their instrumentalities.

The hundreds key, which is among the keys utilized in the adding machine to set up amounts from 100 to 199, is designated by the numeral 86. This key has associated therewith contact arms 81 and 88. The contact arm 81 is connected to a bus wire 89 which is in turn connected to the positive side 98 of a source of current. The contact arm 88 is connected to the b terminal of relay coil 92. The a terminal of the relay coil 92 is connected to a bus wire 96 which is in turn connected to the negative side 9| of a source of current. A fuse 91 is positioned in the positive side of the line and a fuse 98 is positioned in the negative side of the line. The bus wire 96 has in circuit therewith a 'fuse 99 which is of preferably smaller capacity than that of the fuse 98. The bus wire 96 also has in series therewith, a suitable resistor I88 to limit the amount of current flowing therethrough.

The relay coil 92 has associated therewith an armature 83 which is normally in contact with a contact point 94 and when attracted, due to the energization of the magnet 92, the armature 93 breaks contact with the contact point 94 and establishes contact with the contact point 95. The armature 93 is connected to the negative side of the line by means of a circuit wire IN. The circuit wire I8I includes a lamp I82, which may be used as a visual indicator, a fuse I83 and a current limiting resistor I84, to prevent excessive current from flowing therethrough. When the one hundreds key 86 is to be pressed, contact is established between the contact arm 81 and the contact arm 88 and the magnet 92 is ener gized.

The two hundreds key I84 has contact arms I and I86 associated therewith, together with a relay coil I81, having an armature I88 and contact members I89 and H8. The armature I88 is normally in contact with the member I89.

The three hundreds key I I I has contact arms H2 and H3 associated therewith, together with a relay coil I I4, having an armature I I5 and contact members H6 and H1. The armature H5 is normally in contact with the member I I6.

The four hundreds" key I I8 has contact arms H9 and I28 associated therewith, together with a relay coil I2 I having an armature I22 and contact members I23 and I24. The armature I22 normally is in contact with the member I23.

The five hundreds key I25 has contact arms I26 and I21 associated therewith, together with a relay coil I28, having an armature I29 and contact members I38 and I3i. The armature I29 is normally in contact with the member I38.

The six hundreds key I32 has contact arms I33 and I34 associated therewith, together with a relay coil I35, having an armature I36 and contact members I31 and I38. The armature I36 is normally in contact with the member I31.

The seven hundreds key I39 has contact arms I48 and I4l associated therewith, together with a relay coil I42, having an armature, I43 and contact members I44 and I45. The armature I43 is normally in contact with the member I44.

The eight hundreds key I46 has contact arms I41 and I48 associated therewith, together with a relay coil I49, having an armature I58 and contact members I5I and I52. The armature I59 is normally in contact with the member I5I.

The nine hundreds key I 53 has contact arms I54 and I55 associated therewith, together with a relay coil I56, having an armature I51 and contact members I58 and I59. The armature I51 is normally in contact with the member I56.

One contact member of each of the above one hundreds through the nine hundreds keys are connected to the bus wire 89. The other of each of the contact members is connected to the b terminal of the associated relay coils. The a terminals of the relay coils are all connected to the bus wire 96.

The contact member 94 is connected to the armature I88; the contact member I89 is connected to the armature I I5; the contact member H6 is connected to the armature I22; the contact member I23 is connected to the armature I29; the contact member I38 is connected to the armature I36; the contact member I31 is connected to the armature I43; the contact member I44 is connected to the armature I58; the contact member I5I is connected to the armature I51;' and the contact member I58 is connected by means of a wire I6I tothe a terminal of all of the counter magnets H in the group or bank I62, which represents counters registering bills from 00 to 099.

the counters in the bank I62 have their a terminals connected to the negative side of the line.

The contact member is connected by means of a wire I63 to the a terminals of all of the counter magnets H in the bankl64 of counters provided for counting bills showing amounts of to 199. The contact member I I8 is connected by means of a wire I65 to the a terminals of all of the counter magnets 1| in the bank I66 which counts all bills having amounts from 200 to 299. The contact member H1 is connected by means of a wire I61 to the a terminals of all of the counter magnets H in the bank I68 which counts all bills having amounts from 300 to 399. The contact member I24 is connected by means of a wire I69 to the a terminals of all of the counter magnets 1| in the bank I18 which counts all bills having amounts from 400 to "499. The contact member I3! is connected by means of .a wire I1I to the a terminals of all of .the counter magnets 1| in the bank I12 which counts all bills having amounts from 500 to 599. The contact member I38 is connected by means of a wire I13 to the a terminals of all of the counter magnets H in the bank I14 which counts all bills having amounts from 600 to 699. The contact member I45 is connected by means of a wire I15 to the a terminals of all of the counter magnets H in the bank I16 which counts all bills having amounts from "700 to 799. The contact member I52 is connected by means of a wire I1 to the a terminals of all of the counter magnets H in the bank I18 which counts all bills having amounts from "800 to "899. The contact member I59 is connected by means of a wire I60 to the a terminals of all of the counter magnets H in the bank I which counts ,all bills having amounts from 900" to "999.

With this arrangement the a terminals of the "00 to 099 counter magnets are connected to the negative side of the line at all times except when one of the relay armatures above described, is attracted due to the energization of its magnet thereby breaking contact with the a terminal of the counter magnets in the banks I62 and establishing contact with the (1 terminals of the counter magnets of any other banks.

If the five hundreds key I 25 is depressed contact is established between the contact arms I26 and I21 energizing the magnet I28 and attracting the armature I29. The armature I29, upon being attracted, breaks contact with the contact member I30 and establishes contact with I3I thereby connecting the negative side of the line to the (1 terminals of the counter magnets in the bank I12 via the wire I1I.

The 00 counter magnet, which is the one in the upper left hand bank I62, Figure 8d, has

its 1) terminal connected by means of a wire I8I to a contact arm I82 associated with the no bill key I19.

The contact arm I82 has a contact arm I83 adapted to cooperate therewith when the key I19 is depressed. The connections to the contact arm I83 will presently be described.

The "tens key I85 has associated therewith contact arms I86, I81. The twentys key I88 has associated therewith contact arms I89, I913. The thirtys key I9I has associated therewith contact arms I92, I93. The fortys key I94 has associated therewith contact arms I95, I98. The fiftys key I91 has associated therewith contact arms I98, I99. The sixtys key 200 has as sociatcd therewith contact arms 201, 202. The seventys key 203 has associated therewith contact arms 204, 285. The eightys key 205 has associated therewith contact arms 201, 288. The ninety keys 209 has associated therewith contact arms 2I0, 2H. The contact arms 586, I89, I92, I95, l98, 26I, 204, 201 and 2I0 are connected by a bus wire 2I2 which is in turn connected to the positive side of the line 90.

The contact arm I81 is connected to the b terminal of relay magnet coil 2I3. The contact arm I is connected to the 1: terminal of relay magnet coil 2I4. The contact arm I93 is con- 'nected to the b terminal of relay magnet coil-2I5.

The contact arm I95 is connected to the b terminal of relay magnet coil H6. The contact arm I99 is connected to the b terminal of relay magnet coil 2". The contact arm 202 is connected to the b terminal of relay magnet coil 2 I8. The contact arm 205 is connected to the b terminal of relay magnet coil 2I9. The contact arm 208 is connected to the b terminal of relay magnet coil 220 and the contact arm 2II is connected to the b terminal of relay magnet coil 22I. The a terminals of all thesecoils are connected by a bus wire 222 and through a limiting resistor 224 and a fuse 223 to the negative side of the line 9|.

An armature 225 associated with the relay coil 2I3 is normally in contact with a group of contact points 226 and, when attracted by the coil 2I3, breaks contact with the contact point 226 and establishes contact with a group of contact points 221. The groups 226 and 221 each contain ten contact points.

An armature 228, associated with the magnet coil 2I4, is normally in contact with a contact point 229 and when attracted by the magnet 2I4 breaks contact with the contact point 229 and establishes contact with a group of contact points 230.

An armature 23I, associated with the magnet coil 2I5, is normally in contact with a contact point 232 and when attracted by the magnet 2I5 breaks contact with the contact point 232 and establishes contact with a group of contact points 233.

An armature 234, associated with the magnet coil 2I6, is normally in contact with a contact point 235 and when attracted by the magnet 2 I6, breaks contact with the contact point 235 and eztsablishes contact with a group. of contact points 2 An armature 231, associated with the magnet coil 2I1, is normally in contact with a contact point 238 and when attracted by the magnet 2I1, breaks contact with the contact point 238 and establishes contact with a group of contact points 239.

An armature 240, associated with the magnet coil 2I8, is normally in contact with a contact point HI and when attracted by the magnet 218 breaks contact with the contact point 24I and 2eitablishes contact with a group of contact points An armature 243, associated with the magnet coil 2I9, is normally in contact with a contact point 244 and when attracted by the magnet 2 I9, breaks contact with the contact point 244 and eitablishes contact with a group of contact points 2 5.

An armature 246, associated with the magnet coil 220, is normally in contact with a contact point 241 and when attracted by the magnet 228 breaks contact with the contact point 241. and eitablishes contact with a group of contact points 2 8.

An armature 2'49, associated with the magnet coil 22B, is normally in contact with a contact point 250and when attracted by the magnet 22!, breaks contact with the contact point 258 and establishes contact with a group of contact points 251.

The group of contactpoints 238, 233, 236, 239, 242, 245, 248, and 25I each contains ten contact points.

The armature 225 is permanently connected to the contact point 229; the armature 228 is permanently connected to the contact point 232; the armature 23I is permanently connected to the contact point 235; the armature 234 is permanently connected to the contact point 238; the armature 231 is permanently connected to the contact point 24I; the armature 240 is permanently connected to the contact point 244; the armature 243 is permanently connected to the contact point 241; the armature 246 is permanently connected tothe contact point 250 and the armature 249 is connected by means of a wire 252, through a limiting resistor 256, and a fuse 254, to the negative side of the line 6|.

The connections to the groups of contacts will presently be described.

In the units section, the one key 255 has associated therewith contact arms 256 and 251; the two key 256 has associated therewith contact arms 256 and 266; the three key 26! has associated therewith contact arms 262 and 266; the four key 264 has associated therewith contact arms 265 and 266; the five key 261 has associated therewith contact arms 266 and 266; the six key 216 has associated therewith contact arms 211i and 212; the seven key 213 has associated therewith contact arms 214 and 215; the eight key 216 has associated therewith contact arms 221 and 216; the "nine key 219 has associated therewith contact arms 266 and 288.

The contact arms 256, 256, 262, 265, 268, 2%, 214, 211 and 266 are connected to a bus wire 262 which is in turn connected to the positive side of the line 60.

The contact arm 251, which is associated with the one key 255, is connected to the b terminal of each of the relay coils in the horizontal row 6l-R to 6l-R inclusive and to the relay i--R in the lower portion of the diagram, by means of a bus wire 3. The contact arm 266, which is associated with the two key 266, is connected in a like manner to the in terminal of each of the relay coils in the horizontal row 62R to 62-R inclusive and to the relay 22-12. in the lower portion of the diagram, by means of a bus wire 326. The contact arm 263, which is associated with the three key 265, is connected in a like manner to the b terminal of each of the relay coils in the horizontal row 63-15. to 93R inclusive and to' the relay 3-R in the lower portion of the diagram, by the wire 34L The contact arm 266, which is associated with the four key 264, is connected in a like manner to the b terminal of each of the relay coils in the horizontal row 64-R to 64-R inclusive, and to the relay 4-R in the lower portion of the diagram, by means of a bus wire 356. The contact arm 266, which is associated with the five key 261, is connected in a like manner to the 2) terminal of each of the relay coils in the horizontal row 65-R. to 65-3. inclusive and to the relay 5-R in the lower portion of the diagram, by means of a bus wire 365. The contact arm 212, which is associated with the six key 2'56, is connected in a like manner to the b terminal of each of the relay coils in the horizontal row 66-R to 96--R inclusive, and to the relay 6-H. in the lower portion of the diagram, by means of a bus wire 311. The contact arm 215, which is associated with the seven key 213, is connected in a like manner to the b terminal of each of the relay coils irrthe horizontal row 61--R. to 91-R. inclusive, and to the relay 1R in the lower portion of the diagram, by means of a bus wire 386. The contact arm 216, which is associated with the eight key 216, is connected in a like mannerto the b terminal of each of the relay coils in the horizontal row 66R to 98R. inclusive, and to the relay 6R in the lower portion of the diagram, by means of a bus wire 46l. The contact arm 26!, which is associated with the nine key 216, is connected in a like manner to the b terminal of each oi the relay coils in the horizontal row 66-R to 66-R inclusive, and to the relay 9R in the lower portion of the diagram, by means of a bus wire 3.

The connections of the 0: terminals of these relays will now be described.

Each contact point in group 221 is connected, by means or a cable 263, to an a terminal of the relay coils in the group from Iii-R to i6-R inclusive. These contacts, associated with the tens" keys, in the tens section, are utilized in forming all numerals from it to 19. Contact is established between the armature 225 and the contact points 221 whenthe tens key I65 is depressed, due to the energization of the magnet m.

As pointed out above, the armature 225 is normally in contact with the contact points 226; each of these contact points is connected by means of a cable 264 to an a terminal or a relay coil in the group from 66-Pt to 66-R-inclus1ve.

Each of the contact points in the group 236 is connected, by means of a cable 265, to an a tcrminal of a relay coil in the group from 26R to 26-R inclusive.

Each of the contact points in the group 233 is connected, by means of a cable 266, to an a terminal of a relay coil in the group from 36-R to 36R inclusive.

Each of the contact points in the group 236 is connected, by means of a cable 261, to an a ter minal of a relay coil in the group from 46--R to i6R inclusive.

Each of the contact points in the group 236 is connected, by means of a cable 266, to an a terminal of a relay coil in the group from ill-R to 56-R inclusive.

Each of the contact points in the group 242 is connected, by means of a cable 266, to and terminal of a relay coil in the group from 66--R to 66-R inclusive.

Each of the contact points in the group 246 is connected, by means of a cable 266, to an a terminalof a relay coil in the group from 16--R to 16-R inclusive.

Each of the contact points in the group 243 is connected, by means of a cable 26!, to an a terminal of a relay coil in the group from 66-R to 86-R inclusive.

Each of the contact points in the group25l is connected, by means of a cable 262, to an a'terminal of a relay coil in the group from 66-12. to 66-38. inclusive. 1

The armature 263 is associated with the relay coil 66--R; the armature 264 is associated with the relay coil I6R'; the armature 266 is associated with the relay coil 26R; the armature 266 is associated with the relay coil 86-R; the

armature 261 is associated with the relay coil 46R; the armature 266 is associated with the relay coil 56R; the armature 266 is associated with the relay coil 66-R; the armature 366 is associated with the relay coil 16-R; the armature 36| is associated with the relay coil 6 6R; the armature 362 is associated with the relay coil 66-12 The armatures 263 to 662 inclusive, and the b terminals of the relay coils in the group 66-R to 66R inclusive are connected in common by a bus wire 366 and this bus wire is connected by means of a wire 364 to a contact point 366 associated with the relay 6-12..

The armatures 366 to 3|! inclusive are associated with the group or relays 6IR to 6i-R. inclusive and are connected together by means of a bus wire 6 which in turn is connected by means of a wire 443 to a contact point 444 associated with the relay IR.

The armatures M3 to 321 inclusive are associated with the group of relays 02-R to 32R inclusive and are connected together by means of a bus wire 328 which in turn is connected by means of a wire 445 to a contact point 446 associated with the relay 2R.

The armatures 330 to 333 inclusive are associated with the group of relays 03--R to 93-R inclusive and are connected together by means oi! a bus wire 340 which in turn is connected by means of a wire 441 to a contact point 448 associated with the relay 3-R.

The armatures 342 to 35I inclusive are associated with the group of relays 04-R to 94-R inclusive and are connected together by means of a bus wire 352 which in turn is connected by means of a wire 449 to a contact point 450 associated with the relay 4--R,

The armatures 354 to 363 inclusive are associated with the group of relays 05--R to 95R inclusive and are connected together by means of a bus wire 364 which in turn is connected by means of a wire 45| to a contact point 452 associated with the relay 5R.

The armatures 366 to 316 inclusive are associated with the group of relays 06R to 96R inclusive and are connected together by means of a bus wire 316 which in turn is connected by means of a wire 453 to a contact point 454 associated with the relay 6-R.

The armatures 318 to 381 inclusive are associated with the group of relays 01R to 91-R inclusive and are connected together by means oi a bus wire 388 which in turn is connected by means of a wire 455 to a contact point 456 associated with the relay 1R.

The armatures 390 to 399 inclusive are associated with the group of relays 08R to 98R inclusive and are connected together by means of a bus wire 400 which in turn is connected by means of a wire 451 to a contact point 458 asso ciated with the relay 8R.

The armatures 402 to 41! inclusive are associated with the group of relays 09-R to 99-5. inclusive and are connected together by means of a bus wire 4|2 which in turnis connected by means of a wire 459 to a contact point 460 associated with the relay 9R.

The a terminals of the group of relays l--R to 9-3, inclusive are connected together and to the negative side of the line by means of a wire 4, via a fuse 4l5, a limiting resistor 416, a second limiting resistor 411 and a second fuse 418.

The relay 9-R has an armature 4H? normally in contact with the contact point 305 and permanently connected to a contact point 420, associated with the relay 8-R; the relay 8R has an armature 42! normally in contact with the contact point 420 and permanently connected to a contact point 422, associated with the relay 1-18; the relay 1R has an armature 423 normally in contact with the contact point 422 and permanently connected to a contact point 424, associated with the relay 6--R; the relay 6-H has an armature 425 normally in contact with the contact point 424 and permanently connected to a contact point 426, associated with the relay 5-R; the relay 5-R has an armature 421 normally in contact with the contact point 426 and permanently connected to a contact point 428, associated with the relay 4R; the relay 4R has an armature 429 normally in contact with the contact point 428 and permanently connected to a contact point 430, associated with the relay 3-R; the relay 3R has an armature 431 normally in contact with the contact point 430 and permanently connected to a contact point 432 associated with the relay 2-R; the relay 2R has an armature 433 normally in contact with the contact point 432 and permanently connected to a contact point 434, associated with the relay i-R; and the relay l-R has an armature 435 normally in contact with the contact point 434 and connected by means of the wire 436 to a contact arm 431 which is associated with the motor bar key 438.

The contact am 430, in cooperative relation with the contact arm 431, is connected via the wire 440 to the positive side of the line.

The contact arms 431 and 438 are bridged with a suitable condenser 46| to limit or reduce sparking. The condenser 46I is bridged with a resistor 462 having high resistance and serving to discharge the condenser.

When none of the relays l-R to 8R have been energized the act of pressing themotor bar 439 completes a circuit which may be traced as follows:

From the positive side of the line 80 via the wire 440 to the contact arm 438 and to the contact arm 431 which is in contact therewith due to the depression of the motor bar; from 431 current flows via the wire 436 to the armature 435 of the relay IR, to the contact 434 which is normally in contact therewith and thence to the armature 433 of the relay 2-R.

Since the armature 433 is normally in contact with the contact point 432 and the remainder of these relays through the relay 9--R, all have their armatures normally in contact with contact points as above described, current flows from the contact point 432 via the armature 431, the contact point 430, the armature 429, the contact point 428, the armature 421, the contact point 426, the armature 425, the contact point 424, the armature 423, the contact point 422, the armature 42!, the contact point 420, the armature M9, the contact point 305, and is delivered via the wire 304 to the bus wire 303 which connects to the b terminals of the relays fill-R to 90-13; and at the same time flows, via the same bus wire, to armatures 293 to 302 inclusive associated with these relays.

If the a. terminal of any one of the relays Iii-R to 90-R receives an impulse from the negative side of the line via any one of the relays 213 to 226 inclusive associated with the tens keys, said first relays will operate. If none of the tens keys has been operated, a zero circuit is maintained, which may be traced as follows:

From the negative side of the line iii, via the wire i252 and via the armature 2%, the contact point 250, the armature 246, the contact point 241, the armature 243, the contact point 244, the armature 240, the contact point 235, the armature 231, the contact point 238, the armature 234, the contact point 235, the armature 23!, the contact point 232, the armature 228, the contact point 229, thearmature 225, thegroup of contact points 226 and via the cable 284 to the a terminals of the relays Ill-R to 09R and to the a terminal of the relay 00R.

Since, of this group, the only relay receiving current via its bterminal is the Bil-R relay, this relay only will be actuated. The b terminals of all the other relays from 0lR to 90-R are not energized due to the fact that none of the armatures associated with the relays |R to 9R have been actuated.

The connections of the device, when the 00-R relay is energized, will presently be described in connection with the description of the handling of the no-bills.

If one of the relays i-lt to 9-H has been actuated due to the depression of a tens'l ey and/or a units key, the circuit to the bus wire 303 feeding the relays 00R to 9-P. is disabled. For example, suppose the relay E-R is energized due to the pressing of the five key in the units row, designated as 261, closing the contacts 299 and 299 and supplying current to the b terminals of the relays 05R to 95R and the relay ft-R via the bus wire 365, the relay 5-R is energized, due to the fact that its a terminal is connected to the negative side of the line via the bus wire 4 which is energized due to the depression of the key 261.

The armature 42'! is attracted and leaves the contact point 428 to establish contact with the contact point 452. This breaks the zero circuit above described and when the motor bar 939' is depressed the current flows via the wire 936 and via the armatures and contact points or the relays IR to 4R and to the armature it'll of the relay 5R. Due to the fact that the armature 921, when attracted, makes contact with the contact point 452, current flows from the armature 32i via this contact to the bus wire (359 which energizes the armatures 35 3 to 369, inclusive, which are associated with the relays 99-R to 99-3., therefore the relays lR to 9R respectively are adapted, when actuated, to energize the armatures associated-with the relays 98-11%. to 9l-R through the relays 09-R to 99-R.

The contact points 54i associated with the armature 293 of the relay -R are each connected by means of the cable 992 to the counterrnagnets representing 00 in each of the banks or" counters; i. e., 00, I00, 200, etc, through 909 inclusive.

The connection to the 00 counter magnet has the contact arms H82 and H83 in series therewith through the wires mi and NM. The contact points I82 and 993 are normally open and associated with the no-bill lrey I19. By means of this key the 00 counter may be caused to count the number of entries of no-bills.

The "no-bill key is depressed, closing the contacts M2 and I83 thereby completing a circuit from one of the contacts Ml to the b terminal of the 00 counter magnet in the bank I92. The a terminal is connected via the wire ltl to the zero circuit which is maintained by the relays associated with the hundreds keys and thence to the negative side of the line.

After depressing the nmbill key, the motor bar 439. is depressed, thereby closing the contacts 831 and 438 and permitting current to how from the positive side of the line through the series or armatures and contacts associated with the relays IR to 9-R inclusive and thence, via the wire 904, to the bus wire 303 which supplies current to the b terminals of the relays Elli-R, l0-R through 90-R. Of this last group of relays, the 00 relay is the only one energized due to the fact that its a terminal is connected via the cable 284 to one of the contact points in the group 229.

tween the contact in the group I and the bus wire 303, whereupon current flows via, the cable 542 and via the wire I84, the no-bill contacts I82 and I93 and via the wire I8I to the b terminal of the 00 counter magnet.

To select the I00 counter, the I00 key 86 is depressed, thereby closing the contacts 81 and 38, energizing the relay 92, and attracting the armature 93. This disables the zero circuit through the relays associated with the "hundreds" keys, due to the fact that the armature 93 breaks contact with 94 and establishes contact with the contact point 95, permitting current to :flow via'the wire I63 to the a terminals of all of the counters in the bank 564- containlng counters from I00 to I99. I

The motor bar 439 is then pressed, closing contacts 431 and 438, and energizing the relay 00-R in the same manner described above in connection with the no-bill selection. This attracts the armature 293, causes it to establish contact with the group of contacts I, connecting the same with the bus wire 303 and delivering current via the cable 342 to the 2) terminal of the 90 counter, the E90 counter, the 200 counter and each succeeding 00 counter through 900 counter, but as the counter magnets in the bank I64 only have their (1 terminals connected, and as the I00 is the only one having its 1) terminal connected, the I00 counter magnet is the only one through which current can pass to cause it to add a l.

The other relays have their contacts connected via cables to a corresponding counter magnet in each bank but in order to keep the drawings as simple as possible, they are not herein described, with the exception of the contact points associated with the relay 99-12 This group of contacts is designated by the numeral 463 and they are connected via a cable 494 to the counter representing 99 in each bank of counters; i. e., 099, 199, 299, 399, etc., through 999, inclusive.

When numerals are selected which do not contain zeros the connections are slightly different due to the fact that one or more of the relays l-R to 9-R is actuated, thereby disabling the circuit to the bus wire 303 which energizes the relays 00-R to 90-43. As an example of this,

suppose the figure 999 was selected. The nine" key in the hundreds, tens" and units columns are depressed.

When the nine key I53 in the hundreds column is depressed, contacts 854 and I55 are closed, thereby energizing the relay I55 and attracting the armature 051. The armature I51 breaks contact with N50 and makes contact with 659, thereby connecting the a terminals of the counter magnets in the bank I90 to the negative side of the line, via the wire I60.

When the .nine key 209 in the tens column is depressed, the contact points 2I0 and 2 are closed, thereby energizing the relay 22I and attracting the armature 249. This disables the zero circuit associated with the "tens column, due to the fact that when the armature 249 is attracte'd it breaks contact with the contact point 250 and establishes contact with the ten contact points in the group 25l and establishes circuits via the cable 292 with the a terminals of the relays 90-R to 99-R inclusive.

When the "nine key 219 in the uni column is depressed, the contacts 280 and 28I are closed; This supplies current from the positive side of the line 90 to the bus wire 3 which connects to the b terminals of the'relays 09--R to 99R but since the a terminal of the relay 99-R is the only relay in this group which is connected by the action of the nine key 209 in the "tens row, it, only, will be energized and will attract the armature 4. At the same time the relay 6-R is energized, due to the fact that its b terminal isalso connected to the bus wire 4". The operation of this relay will presently be described. when the relay "-R attracts the armature 4 it establishes a connection between the wire 4|! and the ten contacts in the group 443. These last contacts are connected via the cable 464 to the II counters in each of the banks as above described.

Sincethe a terminals in the bank I60, only, are

connected to the negative side of the line via the wire I", due to the depression of the nine key I 53 in the "hundreds" column, and the b terminal oi the 369 counter magnet only is energized, the 683 counter in this bank only will receive current when the wire 4!! is supplied with energy.

The wire 2 is energized in the following manner:

Remembering that normally a circuit is maintained from the motor bar contact 431 through the armatures, and contacts of the relays l--R to 9-11. inclusive, for feeding the bus wire 303 via the wire 304, which is in turn connected to the b terminals of the relays Oil-11, to Bil-R, when the relay 6R was energized, as described above, its armature H9 is attracted and the circuit between the motor bar contactand the bus wire 303 is disabled due to the fact that contact between the armature 4|! and the contact point 305 is broken. The armature 9, upon leaving the contact 305, establishes contact with the contact point 460.

Now, when the contact points 431 and 438 are connected by the depression of the motor bar 433, current flows from the positive side of the line 80 via the wire 440, contact 438, contact 431, and the wire 436 to the series of armatures and contacts in the relays l-'R to 6-R,' inclusive, thence to the armature 3 associated with the relay 9R and via the contact point 460 and the wire 459 to the bus wire 2. As above described, current can only flow through the magnet associated with the 998 register in the bank I60 due to the completion of the circuit from its a terminal, because of the depression of the "nine key I53 in the hundreds row. a

The device is also provided with a counter 465 for counting the total customers. Thea terminal of this counter is connected via a wire 466, ii desired, through a single lamp 461, limiting resistor 463, a fuse 469, to the negative side of the line. The b terminal of this counter is connected via a wire 410 to a contact arm 41I which is associated with a sub-total key 413. The contact arm 41l has cooperating therewith, a contact arm 412 which is connected by a wire 414 to the positive side of the line.

' When a series oi one customers bills has been added in the adding machine, the sub-total key 413 is depressed and the counter 465 is energized and a value of 1 is entered.

The grand total key 415 has contacts 416 and 411 associated therewith but these contacts are not shown as connected to any circuits. It is obvious that these contacts may be connected to control electrical circuits in a manner similar to that shown in connection with other keys.

Having shown and described a simple embodiment of the invention, which may be taken to be illustrative of the same, it is obvious that many changes may be made without departing from lowing claims.

, What is claimed is:

1. In combination, a plurality of keys arranged in rows having orders of "units, tens, and hundreds", a pair of contacts and a plurality of relays interconnected therewith for each key in said units row, each of said relays including a plurality of contacts adapted to be closed by the actuation thereof, a plurality of banks of magnetically operated counters, individual connections between said relay contacts and said counters whereby any given relay may control the energization of a single counter in each of said banks, a pair of contacts and a single relay interconnected therewith for each key in said "tens row, said last relays each including a plurality of contacts adapted to be closed by the actuation thereof, said contacts being interconnected with the relays associated with the units keys, a plurality of back contacts on the relay associated with at least one of the tens keys for maintaining zero. circuits when said relay is in its normal position, connections between said back contacts and at least one relay in each plurality of relays associated with the units keys, single back contacts on the other relays associated with the tens keys and included in said zero circuit, a relay and a pair of contacts associated with each of the keys in the hundreds row, said relays being adapted normally to maintain a circuit including the return wires of all said counters in one of said banks and to maintain circuits including the return wires of all of said counters in another of said banks when said zero circuit is disabled by the depression of any key in the hundreds row, the bank being determined by the key depressed.

2. In a. key controlled statistical device, a plurality of keys arranged in denominational rows,

a plurality of counters each having an actuating winding, said counters being arranged in banks, a pair of electrical contacts associated with each key, a plurality of multi-contact relays associated with each of said keys in one of said denominational rows, said relays having their contacts interconnected with the windings of said counters, whereby any given relay may control the energization of a single counter ,in each bank, a single relay for each key in a second of said denominational rows adapted to be energized when its key is depressed, said single relays being provided with multi-contacts, connections between the contacts of said single relays and the actuating windings of said first relays whereby said single relays may control the energizing of said first relays; a double-throw, single-contact relay associated with each pair of contacts oi the keys in a third of said denominational rows, and individual connections between the contacts of said last relays and the return circuits of the banks of counter windings, whereby said first relays and said last relays conjointly control the energization of said counter windings.

3. In a key operated statistical machine, a plurality of denominational rows of keys of units, tens and hundreds orders, a plurality of counting devices arranged in banks, a pair of contacts associated with each of said keys, magnetic actuating means for each of said counting devices, a plurality of relays associated with each of the units" keys and having combinational circuits including said contacts, said reranged to enter a value of l each time its combination of keys is depressed.

i. In a key operated statistical device in which the keys are arranged in denominational rows of units", tens and hundreds orders, a pair of electrical contacts associated with each key, a plurality of counters each having an actuating magnet, said magnets having actuating and return circuit terminals and arranged in banks, a plurality of relays associated with each key in said ,units row, combinational circuits controlled by said relays and adapted to complete connections to an actuating terminal of one magnet in each of said banks, electrical means associated with each key in said tens row for effecting the energization of one relay associated with each of said units keys, electrical means associated with each key in said hundreds row for connecting the return circuit terminals of all or the actuating magnets in one of said banks to a source of current, and an actuating key and pair of contacts associated therewith, said contacts being connected to said source and to said completed connections whereby one of said actuating magnets in one of said banks may be energized when said actuating key is depressed.

5. A statistical device according to claim a in which the relays associated with the contacts of at least two of said denominational rows of keys normally maintain zero circuits including at least one of said counters, and in which an additional key is provided for connecting said zero circuit to said source of current for counting bills upon which no amounts occur.

6. In a statistical device having a group oi units" keys, a group of tens keys and agroup of hundreds keys, a plurality of counters each controlled by an electronagnetic winding, said counters being arranged in banks, a pair oi key contacts and a double-throw relay for each of said hundreds keys, said relays having actuating windings included circuits with said key contacts and having their double throw switches normally maintaining a no-hundreds circuit, which normally maintains a return circuit for all of the windings in one of said banks having a value of less than 109, said no-hundreds cir cult being adapted to be disabled when a hundreds key is depressed, thereby disabling the return circuit of the windings of said bani; having a value of less than 100 and completing the return circuits for all of the windings in another of said banks depending upon the value of the hundreds key depressed, a pair of key contacts and a double-throw relay 'for each of said tens keys, said second relays having actuating windings in circuit with said second key contacts and having its double-throw switches normally maintaining a no-tens circuit, a pair of key contacts and a double throw relay for each of sale units keys, a third series of relays being casinos electro-magnetic winding oi one counter in each oisaid banks which has had its return wire connected to a source of current by one of said first relays, and a zero-zero circuit associated with said units keys and normally maintained when no units key is depressed.

7. The invention according to claim 6 in which each series of said third relays grouped with each of said units" keys is comprised of ten relays and in which said zero-zero circuit associated with said units keys includes doublethrow relays having contacts connected in series with said zero-zero circuit whereby the energization of any one of said last relays due to the depression of a key in said units row will disable said zero-zero circuit.

8. in a key operated statistical device in which the keys are arranged in denominational rows of units, tens and hundreds orders, a pair of electrical contacts associated with each key, a plurality of counters each having an actuating magnet, said magnets having actuating and return circuit terminals and arranged in banks, a plurality oi multi-contact electrical relays associated with each key in said units row, eachrelay having a magnet with actuating and return circuit terminals and having its contacts connected to the actuating circuit terminal of one counter magnet in each oi said banks, a second plurality of multi-contact relays one of which is connected with each pair oi key contacts of said tens row of keys, each of said last relays having its contacts connected to control the return circuits of one relay in each of said first groups, a relay associated with the key contacts or" each irey in said hundreds row having its contacts connected to one side of a source of current and to the return circuit terminals of all of the counter magnets in one of said groups.

59. A statistical device according to claim 8 in which no zero keys are provided in said denominational rows, in which the relays associated with said tens and hundreds' lreys maintain zero circuits enabling at least one of said multicontact relays associated with one key in said units row, and in which a zero-zero circuit is associated with said units row of keys comprised in part of contact arms and contact points of a series of single-contact double-throw relays, each of which is adapted to disable said zerozero circuit when a key in said first row of keys is depressed.

iii. In combination, a plurality of keys arranged in denominational rows having orders of units, tens and hundreds, a contactor and a plurality of relays each having one terminal of its actuating magnet interconnected therefor each key in said units row, said relays heing termed units relays and each being prowith an armature contact member and a plurality of contacts adapted to be contacted by said contact member, a plurality of banks of magnetically operated counters, connections between the contacts of said units relays and the magnets oi said counters, a cooperating member each of said contactors, connections between all said cooperating members and one side of a source of current, a contactor and a single relay having one terminal of its actuating magnet interconnected therewith for each key in said tens row, a cooperating member for each of said second contactors, connections between all said second cooperating members and said side of said source of current said single relays being termed "tensi relays and each being provided with an armature contact member and a plurality of contacts adapted to be contacted by said contact member, connections between said contacts of said single relays and the actuating magnets of said units relays, back contacts on a plurality of said second relays for mantaining zero circuits when said second relays are in their normal position, connections between said back contacts and at least one relay in each plurality of relays associated with the units key contactors', single back contacts on the others of said single relays and included in said zero circuit, a contactor and a relay having one terminal of its actuating magnet interconnected therewith for each key in the hundreds row said last relays being termed hundreds relays and each being provided with a pair of contacts and a contact arm normally in contact with one contact thereof and adapted to engage the other contact when the relay is actuated, connections between the normally engaged contacts of said hundreds" relays, the other side of said source and the magnets of a bank of said counters having values of less than 100, said circuit being termed no hundreds circuit and being normally maintained when no hundreds key is depressed whereby only counters in said bank having values of less than 100 will be actuated when 'units or tens keys are depressed.

11. In a statistical device, in combination, a plurality of keys arranged in denominational rows having orders of "units", tens and hundreds, electrical contacts controlled by said keys, 8 plurality of relays associated with each pair of contacts controlled by the keys in the units row said relays being termed units relays and each being provided with an armature contact member and a plurality of contacts adapted to be contacted thereby, a plurality of counter magnets grouped in banks, connections between the contacts in said pluralities and said magnets, a single relay associated with each pair of counters controlled by keys in the tensirow, said single relays each having a contact arm, a contact adapted to be engaged by said arm when the relay is energized one of said lastrelays having a plurality of back contacts and the others having a single back contact, all of said arms and back contacts being normally included in a zero tens circuit, a plurality of relays associated with the contacts controlled by keys in said "hundreds row, said last relays each having an armature contact member and a contact adapted to be engaged thereby when the relay is energized and a back contact which is normally engaged by the armature contact member, connections between said armature contact -members and said back contact members and a source of current for normally maintaining a zero hundreds circuit enabling the return circuits of the magnets in one of said banks, and conhaving actuating windings associated with each contact device each of said relays having a group of contacts and a contact member normally maintaining a zero units" circuit and adapted to disable said "zero circuit and establish contact with said plurality of contacts when its actuating winding is energized, a plurality of banks of counters, an actuating magnet for each counter, connections between the contacts in said groups and said counter magnets whereby the contacts in each group when the relay associated therewith is energized enables circuits to one magnet in each bank of counters, a contact device and a relay having its actuating coil associated therewith for each key in said tens" row, said last relays each having contact arms and contacts and connections associated therewith normally maintaining a zero tens circuit and also having a plurality of contacts interconnected with the magnets of said first relays whereby the circuits associated with said tens row acting conjointly with the circuits in said "units row may energize one relay in each plurality of said first relays, and instrumentalities and connections associated with the keys in the hundreds row normally maintaining a zero hundreds circuit enabling the return circuits of the counter magnets in one of said banks when no hundreds keyis depressed, and for disabling said normally maintained circuit and completing the return circuits for the actuating magnets in another of said banks when a hundreds key is depressed.

13. In combination, a plurality of keys arranged in denominational rowshaving orders of units, tens and hundreds, electrical contacts controlled by said keys, a group of multicontact relays associated with each key of said units order, the relays in each group having one coil terminal thereof interconnected with the contacts controlled by its key, a single-relay associated with each key of said tens order each relay having its actuating coil interconnected with the contacts controlled by its key, said single relays each having multi-contacts adapted to be engaged by an armature contactor when actuated, a plurality of back contacts on one of said single relays, a single back contact on each of the other single relays, the back contacts on each relay being normally engaged by its armature contactor, individual connections between said multi-contacts of said single relays and the other coil terminals of said first relays, a plurality of banks of counters each actuated by a single electromagnet and each magnet terminating in an actuating coil terminal and a return circuit coil terminal, connections between the contacts of said first relays and the actuating terminals of saidmagnets. means individually 'associated with the key contacts of said hundreds order and the return circuits of the magnets of each of said banks of counters, and zero circuits for each row of keys normally maintained when none of said keys in its row are depressed, said zero circuits being adapted to be disabled upon the depression of one or more of said keys whereby a key of one order may close contacts to eflectthe completion of one side of the circuit to the magnets and a key of a difierent order may eflect the completion of the other side of said last circuit.

WILLIAM B. AUSTIN. 

